I have 16 chickens in a 12' x 10' coop with 3 different roosts varying in height. She used to sleep on the lowest rung by herself, but the past few nights I've noticed her sleeping in the corner by herself. I've even went in and put her on a roost and he jumps down and goes back to the corner. They haven't laid eggs for about 3 weeks now, but I assumed it was due to winter and the stress of being sick a few weeks ago. She isn't showing any symptoms of being sick, runs around hte yard during the day and is eating and drinking with the rest of the flock. She is a Sicilian Buttercup(I have 2 of those) so smaller than the other hens, but I haven't ever seen any of them pick on her. Is this normal? Should I be worried?